Examples with PixelGrabber java.awt.image.PixelGrabber used on opensource projects

Example 1 with PixelGrabber

use of java.awt.image.PixelGrabber in project entando-core by entando.

the class PNGImageResizer method hasAlpha.

protected boolean hasAlpha(Image image) throws ApsSystemException {
    // If buffered image, the color model is readily available
    if (image instanceof BufferedImage) {
        BufferedImage bimage = (BufferedImage) image;
        return bimage.getColorModel().hasAlpha();
    }
    // Use a pixel grabber to retrieve the image's color model;
    // grabbing a single pixel is usually sufficient
    PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
    try {
        pg.grabPixels();
    } catch (InterruptedException e) {
        throw new ApsSystemException("Error grabbing a single pixel", e);
    }
    // Get the image's color model
    ColorModel cm = pg.getColorModel();
    return cm.hasAlpha();
}

Example 2 with PixelGrabber

use of java.awt.image.PixelGrabber in project Lucee by lucee.

the class Image method hasAlpha.

/**
 * This method returns true if the specified image has transparent pixels
 * @param image
 * @return
 */
public static boolean hasAlpha(java.awt.Image image) {
    // If buffered image, the color model is readily available
    if (image instanceof BufferedImage) {
        BufferedImage bimage = (BufferedImage) image;
        return bimage.getColorModel().hasAlpha();
    }
    // Use a pixel grabber to retrieve the image's color model;
    // grabbing a single pixel is usually sufficient
    PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
    try {
        pg.grabPixels();
    } catch (InterruptedException e) {
    }
    // Get the image's color model
    ColorModel cm = pg.getColorModel();
    return cm.hasAlpha();
}

Example 3 with PixelGrabber

use of java.awt.image.PixelGrabber in project vcell by virtualcell.

the class TextImage method refreshVerticalImage.

/**
 * This method was created by a SmartGuide.
 * @param g java.awt.Graphics
 */
private void refreshVerticalImage(Component component) {
    refreshImage(component);
    if (verticalImage != null) {
        return;
    }
    // 
    // copy image from horizontal image (image) to vertical image (verticalImage) (rotate 90 degrees)
    // 
    int[] pixels = new int[width * height];
    PixelGrabber pg = new PixelGrabber(image, 0, 0, width, height, pixels, 0, width);
    try {
        pg.grabPixels();
    } catch (InterruptedException e) {
        throw new RuntimeException("interrupted waiting for pixels!");
    }
    if ((pg.getStatus() & ImageObserver.ABORT) != 0) {
        throw new RuntimeException("image fetch aborted or errored");
    }
    int[] transposedPixels = new int[width * height];
    int transposed_i = 0;
    int transposed_j = 0;
    for (int j = 0; j < height; j++) {
        for (int i = 0; i < width; i++) {
            transposed_i = j;
            transposed_j = width - 1 - i;
            int newPixel = pixels[j * width + i];
            // 
            if (newPixel != Color.black.getRGB()) {
                newPixel = 0x00000000;
            }
            // pixels[j * width + i];
            transposedPixels[transposed_i + transposed_j * height] = newPixel;
        }
    }
    java.awt.image.MemoryImageSource memoryImageSource = new java.awt.image.MemoryImageSource(height, width, transposedPixels, 0, height);
    Image tempImage = component.createImage(memoryImageSource);
    int verticalWidth = -1;
    int verticalHeight = -1;
    while (verticalWidth == -1 || verticalHeight == -1) {
        verticalWidth = tempImage.getWidth(component);
        verticalHeight = tempImage.getHeight(component);
    }
    verticalImage = tempImage;
}

Example 4 with PixelGrabber

use of java.awt.image.PixelGrabber in project mlib by myshzzx.

the class JavaSIFT method convert.

private FloatArray2D convert(java.awt.Image img) {
    FloatArray2D image;
    PixelGrabber grabber = new PixelGrabber(img, 0, 0, -1, -1, true);
    try {
        grabber.grabPixels();
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
    int[] data = (int[]) grabber.getPixels();
    image = new FloatArray2D(grabber.getWidth(), grabber.getHeight());
    for (int d = 0; d < data.length; d++) image.data[d] = normTo1(RGB2Grey(data[d]));
    return image;
}

Example 5 with PixelGrabber

use of java.awt.image.PixelGrabber in project mlib by myshzzx.

the class FeatureCache method getImageData.

private int[] getImageData(Image img) {
    PixelGrabber grabber = new PixelGrabber(img, 0, 0, -1, -1, true);
    try {
        grabber.grabPixels();
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
    int[] data = (int[]) grabber.getPixels();
    return data;
}